My choice would be 1920x1200. I much prefer 4:3 or 16:10 in a computer monitor.

As for power failing , I just repaired 2 bad caps in my Samsung 27". Caps and shipping for $12 and about 20 minutes work total and she's purring like new again. Might want to consider some troubleshooting and research. Might save you some bucks. Unless you really want a new monitor anyway